And many of Clinton's most passionate supporters still want her to submit her name for nomination at the Democratic National Convention - which could lead to embarrassing numbers of her backers spurning Obama on his biggest stage.

The Daily News previously reported that Clinton has decided not to sign the papers that would allow that to happen. Under Democratic Party rules, that decision is hers alone.

Clinton will play Las Vegas for Obama on Friday, and then head to South Florida on Aug.21.

The stops are expected to focus on voter registration and pushing reluctant Clinton faithful to embrace the Illinois senator. She's also likely to raise some money in the lucrative stomping grounds.